Gripper device.



UNITED"sTAwENTqOFFICE? CARI;IIIINISERSON,E oP OAK-PARK, ILLINOIS, nssIGNOR` 'Io MIEIILE PRINTING PRESS a i 1 MANUFACTURING COMPANY, OPCPIICAGO, ILLINOIS, CORPORATION OP ILLINOIS.`

i' GRIPPER DEVICE.

To all whom t may concern:` j jBe it known-that I," CARL HENDERSON, a citizen of the United States, residing at Oak j Park, in thel county fof Cook-,and State of Illinois, have invented certain new and useful Improvements in" Gripper Devices, of which the following is aspeciflcation j The invention is an improvement upon the constructionv forming the subj ect matter of my co-pending application Serial No. 85,7 79 filed March 22, 1916.

I-Ieretofore it has been usual to provide gripper pads having a smooth `upper face andhcoperating` therewith, rigid grippers v havinga rugose Vface between which rough` face of the gripper finger and smooth face of theV pad the sheet of paper was gripped.

A disadvantage of this construction was that if there occurred anylateral movement ofthe gripper inger relative to the pad,

the paper had a tendency to follow. the

movement of the gripper and slip on the pad, destroying the accuracy of its register.

. A further objection was that where there was avariation in the thickness of the paper and not a corresponding adjustment to the throw of the gripper, the paper was mutilated and the gripped mechanism subjected to injury.

I overcome both Vof these objections by roughening the face of the pad instead of the gripper, and by making the gripper finger yielding instead of rigid, whereby the gripped sheet retains its position on the pad Y notwithstanding any slippage or inaccuracy of stroke of the gripper, and thegripper inger acts upon'they sheet with a soft elastic pressure instead of a harsh unaccommodating grip ofthe former construction.

In orderthat the invention may be readily 40 understood, a preferred embodiment of the same is setforth in the accompanying drawings and in the description based thereon.

As, however, the invention. is-susceptible of embodimentii'n o other and various forms,

the drawing-and description are to be taken in an illustrative and not Vnecessarily lim-V iting sense. In the drawings:

Figure 1 is a fragmentary cross-sectional view through a portion of the printing cylinder showing in side elevation the arrangement of the gripper, the gripper pad and f the blanket clamping device Fig. 2 is a front vview of the combined i Specification 'of Letters Patent. f Appneatioii 'flied Agust s, 1917;'. t serialNo. 185,034.

' selves.

Patented Apr. 15, 1919.

blanket clamp and gripper pad support, showing the gripper pad iXedin adjusted position; A l f Fig. 3 is a perspective view lof the gripper pad; and j Fig 4 is a side detail elevation of the gripper finger@ Y In' thel drawings the ycylinder is indicated at llmounted in the usual way in the side frame of the press and cut away at 12 to provide for` the. mounting of various devices-by means of which i the blanket or plate is clamped in position and the gripper padsare held in properly adjusted positions for c operation with the grippers them- As illustrated, upon the side wall vof the cut away portion 12 of the cylinder is disposed a bracket 13 serving as a support for the shaft 14, the angular position of which is controlled by means of the arm 15 and the set screw 16. Upon this shaft at proper intervals are mounted the supports 17 for the'blanket clamp 18 and the gripper pad 19, these supports being held in adjusted i positions by means of a clamping screw 20 as will be readily understood. The shaft 21 serves as a support for the gripper 22, mounted inthe usual manner to coperate with the gripper pad 19. v

The gripper pad 19, as shown, is an angular plate of aluminum or other suitable material and comprises a horizontal portion 23 having a rugose or roughened face 23a, and a vertical portion 24 arranged at substantially Vright angles thereto. The upper roughened face of the horizontal portionl 23 kof the pad forms a contact surface between which and the lower smooth face 22a of the gripper 22 the sheet is arranged to be gripped, vwhile the vertical portion 24 extends parallel to and vin Contact with the side of the gripper pad support 17 and is provided with a slot 25 for the accommodation of a set screw 26, the end of which is threaded into the `head of the gripper pad support 17.

It will be readily understood that by releasing the set screw 26 the gripperv pad 19 is left free to be adjusted radially of the cylinder to the properheight to adapt the Y ofthe: s'etfjsorew "Will serve tcfxvretlrVj 17emeV the rather hfl 1 5 the f aotthet. ythegripper fingerV tSej itsir` p e lateral movemenofthe tn'gery4 the-peper' l I 11,300,6107, y VL Y gripper pad in adjusted pjositiorifv Hereto?v movement fofttefgripp Afp vfore thegrpper finger hasb'een rig-id `2m-df `I claiml lh'frnbfrie' Y. v @hof gr; d ingu number o'fsuccessve tests bly/placing yielding V1`o1'1gh face; end 1a, gri

:substant'rally the proper position', Ytheyrngty Y' 3* The `c'or'roinatio.n` with avpri/ pressf fthe'efre`r rema'mfafor irS'e; in colrn'oton fir/itl@ cylinder; o-aeYY paper of different thicknesses; by reztsorrloff yielding', being made of slender sprfng'steel,

qnd is thus enabled to accommodate itselfg Y p to-d`erentthicknesses of paper.V f Moreover Vy I'zire 'lfl by roughening the' upper faoe'of tlflepgipper Witnee., n y

per finger smooth; the register of v tefpeper is `i1"1 n*o Wise:V likely to be destrofyedl'y'a tendingv toy maintain' v,its `position with refer,- 

